Friedrich schmidt



(No Model) F. SCHMIDT. GRINDING MILL.

No. 501,106. Patented July 11, 1893.

ATTORNE Y6.

UNITED ST TESI PATENT OFFICE.

FRIEDRICH SCHMIDT, OF NEW YORK, N. Y.

GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 501,106, dated July 11, 1893 7 Application filed March 21, 1893. Serial No. 467,018. (No model.)

To all whom it may concern.-

Be it known that I, FRIEDRICH SCHMIDT, of New York city, New York, have invented an Improved Grinding-Mill, of which the following is a specification.

This invention relates to a mill for grinding flour, in which an upright runner having a dressed periphery acts in conjunction with an upright concave bed stone having a corresponding periphery, and rendered adjustable by certain novel mechanism.

In the accompanying drawings: Figure 1 is a longitudinal section, partly in elevation of my improved grinding mill. Fig. 2 is a vertical cross section online 0c, 00, Fig. 1; Fig. 3 a top view partly in section of the mill and Fig. 4 a detail section through the grinding surfaces of the stones.

The letter a, represents an upright runner and b, is the concave upright standard or bed stone. To the spindle a, of the runner a, which turns in the frame a, there is secured a sleeve or hub 61, which connects two cheek plates d, placed to the right and left of the runner. The runneris composed of six, more or less, sector-shaped stones, which leave a free space in the center and they are attached to the cheeks d, by means of keys or bolts d having rounded ends for the reception of nuts 02 The free space at the center of the runner, serves to gain access to the stones in case of repair. The periphery of the runner a, is dressed in such a manner, that the furrows are formed between upwardly pointing teeth a These teeth extend not quite to the skirt (Fig. 3) so as to properly confine the corn.

The bedstone b, is also made of several sections which are keyed together. Its concave grinding periphery is formed upon the same radius as the runner a, and is provided with teeth b, that correspond to the teeth a The stone 1), which is also made in sections, is secured to a yoke e, that is free to turn slightly on a pivot 6. This pivot is provided with a tapped central section-e ,through which passes a set screw f. The set screw turnsin aframe f and by revolving the screw, the distance between the grinding faces of the stones may be adjusted, as will be readily understood. The yoke e, is supported at its free end, upon a set screw g, which, when turned, tilts the stone b. Thus the stones may be set slightly eccentric to each other, so that the grinding surfaces will gradually approach each other from top to bottom. The corn is through hopper h, fed between the stones, which are inclosed by a casing h, while. the meal is discharged through the spout h My improved mill performs an increased amount of work, requires little power, and permits ready adjustment.

What I claim is- The combination of an upright runner with a concave bed stone, a yoke secured to the bed stone, a perforated tapped pivot on which the yoke turns, and with a hand screw engaging the tapped pivot and a set screw which supports the yoke, substantially as specified. FRIEDRICH SCHMIDT. Witnesses:

F. v. BRIESEN,

A. J ONGHMANS. 

